﻿<!DOCTYPE html>
<html>
<head>
  <title>Serpentine Layout</title>
  <!-- Copyright 1998-2020 by Northwoods Software Corporation. -->
  <meta name="description" content="Arrange a chain of nodes in rows, alternating directions, back and forth." />
  <meta name="viewport" content="width=device-width, initial-scale=1">

  <script src="../release/go.js"></script>
  <script src="../assets/js/goSamples.js"></script>  <!-- this is only for the GoJS Samples framework -->
  <script src="SerpentineLayout.js"></script>

  <script id="code">
    function init() {
      if (window.goSamples) goSamples();  // init for these samples -- you don't need to call this
      var $ = go.GraphObject.make;

      myDiagram =
        $(go.Diagram, "myDiagramDiv",  // create a Diagram for the DIV HTML element
          {
            isTreePathToChildren: false,  // links go from child to parent
            layout: $(SerpentineLayout)  // defined in SerpentineLayout.js
          });

      myDiagram.nodeTemplate =
        $(go.Node, go.Panel.Auto,
          $(go.Shape, { figure: "RoundedRectangle", fill: "white" },
            new go.Binding("fill", "color")),
          $(go.TextBlock, { margin: 4 },
            new go.Binding("text", "key")));

      myDiagram.linkTemplate =
        $(go.Link, go.Link.Orthogonal,
          { corner: 5 },
          $(go.Shape),
          $(go.Shape, { toArrow: "Standard" }));

      var model = new go.TreeModel();
      model.nodeParentKeyProperty = "next";
      model.nodeDataArray = [
        { key: "Alpha", next: "Beta", color: "coral" },
        { key: "Beta", next: "Gamma", color: "tomato" },
        { key: "Gamma", next: "Delta", color: "goldenrod" },
        { key: "Delta", next: "Epsilon", color: "orange" },
        { key: "Epsilon", next: "Zeta", color: "coral" },
        { key: "Zeta", next: "Eta", color: "tomato" },
        { key: "Eta", next: "Theta", color: "goldenrod" },
        { key: "Theta", next: "Iota", color: "orange" },
        { key: "Iota", next: "Kappa", color: "coral" },
        { key: "Kappa", next: "Lambda", color: "tomato" },
        { key: "Lambda", next: "Mu", color: "goldenrod" },
        { key: "Mu", next: "Nu", color: "orange" },
        { key: "Nu", next: "Xi", color: "coral" },
        { key: "Xi", next: "Omicron", color: "tomato" },
        { key: "Omicron", next: "Pi", color: "goldenrod" },
        { key: "Pi", next: "Rho", color: "orange" },
        { key: "Rho", next: "Sigma", color: "coral" },
        { key: "Sigma", next: "Tau", color: "tomato" },
        { key: "Tau", next: "Upsilon", color: "goldenrod" },
        { key: "Upsilon", next: "Phi", color: "orange" },
        { key: "Phi", next: "Chi", color: "coral" },
        { key: "Chi", next: "Psi", color: "tomato" },
        { key: "Psi", next: "Omega", color: "goldenrod" },
        { key: "Omega", color: "orange" }
      ];
      myDiagram.model = model;
    }
  </script>
</head>
<body onload="init()">
<div id="sample">
  <div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:500px; min-width: 200px"></div>
  <p>
  This sample demonstrates a custom Layout, SerpentineLayout, which assumes the graph consists of a chain of nodes.
  The layout is defined in its own file, as <a href="SerpentineLayout.js">SerpentineLayout.js</a>.
  </p>
  <p>
  It also has <a>Layout.isViewportSized</a> set to true, so that resizing the Diagram DIV will automatically re-layout.
  </p>
</div>
</body>
</html>
